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(N0 Model- 3 'sheets-sheet 1.

I'. THOMPSON, Deod., & W. H. WILLIAMSON. S. BRUCE and G. MARSH, executors of F. THOMPSON. 'MACHINERY FOR DRESSING ANDSIITING ILOUR, te. No. 252,298. Patented Jan. IO, 1882.

(NO Model.) 3 sheets-sheet 2.,

F. THOMPSON, Dead., e W. H. WILLIAMSON.

S. BRUOE and G. MARSH, executors Of F. THOMPSON. MACHINERY FOR DRESSING AND SIFTING PLOUR, einel No. 252,298. Patented Jen. 10,1882.

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(No Model.) l n 3SheetsSheet 3.2 F. THOMPSONDeod., 8v W. H. WILLIAMSON.'

Y S, BRUCE and G. MARSH, executors of F. THoMPsoN. MACHINERY FOR DRESSING AND SIET-:LNG FLOUR, &c. No. 252,298." Patented Jan. 10,1882.

l UNITED STATES PATENT OFFICE. a

FREDERICK THOMPSON 'AND` WILLIAM H. WILLIAMSON, OF WAKEFIELD,

COUNTY OF YORK, ENGLAND; GEORGE MARCH AND SAMUELn BRUCE, VEXECUTORS OF SAID FREDERICK THOMPSON, ASSIGNORS TO SAID WILLIAMSON.

MACHINERY FOR DRESSING AND SIFTING FL`OU, 890.

` SPECIFICATION forming part of Letters Patent-.Na 252,298, dated January 1o, 115:32.

Application filed May 8, 1880. (No model.) Fatented in England March 30, 1880.

To all 'whom it may concern:

Be it known' that we, FREDERICK THOMP- soN and WILLIAM HENRY WILEIAMsoN,'both of Wakefield, in the county of York,Kingdom of Great Britain and Ireland, have inventedV new and useful Improvements in Machinery or Apparatus for Dressing and Assorting or Sifting Flour, Middlin gs, and other Matters, of which the following is a specification.

i The invention relates toa traveling brush which-moves backward and vforward under the To this brush is imparted a rotating motion in addition to the horizontal travel, so

that it revolves whileit movesback and forth.

. 'The accompanyingdrawings form a part of this specitication, and illustrate the best means ot' applying the invention. 1

Figure 1 is an elevation of the brush a'nd'operating meansmounted underthelower one ot' a series of sieves, whiclipare shown in section. Fig. 2 is atransverse vertical section, showing the brush under the lower sieve. Fig. 3is a section on line C D, Fig. 1, the sievebottom being broken away to show the brush. l

In allthe views the same reference-numbers are used to denote like parts where they occur.

The description of the sieves and their operating means is merely generahras we do not herein claim there, but reserve the right to 'make future application therefor.

l 1a 1b are sieve-frames-with side bearers, 2, resting on cross-bars 3, carried by sp1 ing arms or levers 4. Thearrangemen tof these arms 4 is such that a great length of spring may he availedof and consequently a stronger but at The result is a very efficient movement of the vsieves. The-springs are arranged alternately onopposite sides of the upright posts, the one series extending upward and the other downward. The sieves are provided with bottoms of material suitable for sifting purposes, as

' not then in gear with either pinion..

vas, stretched to form a bottom to each.- The sieve-frames 8, 9, 1t), 11, 12,13,and 14 are outlets and spouts for carrying off the assorted materials. The lowermost sieve has no tight bottom. The` siftings fall into a hopper, 15, at the bottom of the machine, terminating in a spout, 16, and provided with a` suitable con` veyer, 17, which will collect and deliver the product at the spout 16,*or at any desirable point or points in the bottom of the machine at which an opening may be arranged.

The sieve .3e is provided with the brush 18,

.which forms the main feature of the present application, a-nd which has imparted to it alternately in opposite directions an intermitssY tent combined rotary and longitudinal movement, with a stoppage between each movement or traverse of greater direction than the Vmovement or traverse itself, such stoppage occurring and lasting during the time the segmental cogs, hereinafter referred to, having left one pinion, pass onto and get in gear with the other. The brushis of a scroll shape; but the shape may be modified-as, for example, instead of being scroll-shaped, the brush may have one or more radial arms. operated as follows: f

19 is a main driving-shaft, with a worm, 20, gearing into Worm-wheel 21, which, through shaft 22, drives the wheel or disk 23, which is provided with cogs on a segmental portion of its periphery or face. These cogs, as the disk or wheel is rotated, are brought into gea-r with the pinions 24 25 alternately, and cause the vertical shaft 26, on which these pinions are keyed or fixed, to move round alternately in opposite directions; but during the time occu- .ped by the cogged segment after it has left one pinion and is passing on to the other the vertical shaft 26 remains stationary, sinceitis On the said shaft 26 is also keyed the sprocket-,wheel or pulley 23, to work endless chain 29, which passes also round a similar pulley, 30, running loose at `the opposite end of the machine.

31 is a bar, which is preferably made of wrought-iron, land is constructed with pins, forming a rack, or with teeth. This har is fastened toeach end of the machine, but is capable of adjustment at each end, and is placed parallel With the sieve. On this bar a carriage, 32, is fitted, sliding motion being given thereto by means of the endless chain 29, which is attached to said carriage. The 'carriage also carries a small vertical spindle, 33, pro vided with a pinion, 34, keyed upon it and in gear with the teeth of the rack or bar. At the top of said spindle is mounted the brush 18, which may be of a soft material where the sieve is of silk and of stronger material where a Wire sieve is used. The brush is in contact With the sieve, (or clothing,) and by reason ot' the bar 31 being'adjustable, as aforesaid, more or less pressure may be applied, according to requirement, care beingl taken not io apply so much as to tilt up the sieve or wear the cloth.

Likewise, when required, the'brush may be removed from contact with the s ieve or clothing. rlhe intermittent and alternate motion of the endless chain 29 draws the carriage from one end of the sieve or clothing to the other, and back again, a stoppage of the brush occurring at each end. While theearriage, with the brush, is traveling longitudinally, the pinion 34l gives a rotary motion to the brush, being in gear with the rack, as-aforesaid. Dur ing the return longitudinal motion the rotary motion of the brush is in an opposite direction.

35 and 36 are cranks on the shafts, which are, by means o f connecting-rods 37 38 39 40, joined with the cross-bars 3, and thus move the sieve-frames in directions opposite to each other.

41 is the dliving-shatt, driven by a band, 42, as shown, Fig. l. The shaft 41 drives the lowermost sieve, 5e, directly by means of the rod 43. It also, through pulleys 44, 45, and 46, drives the shafts 36 35, a cord, strap, or band, 47, provided with tightening-pulley 48, being employed for the purpose. The roller 49X -of the inclosed feed-hopper 49 is or may be driven from the shaft 35 by a strap, band, or. belt, 50. The-wormshat`t 51, for operating the conveyer 17, is driven 4from shaft 41 through belt, band, or strap 52. The worm-shaft 19, for working the brush-gear, is driven from the shaft 4l by belt, band,or'strap 53. The material to be treated is received by the hopper 49 and fed to the uppermost sieve by the feedroller 49X, the feed being regulated by the adjustable slide 49 X, so that an even stream of material may be distributed upon the sieve. The slide 49 x is controlled by a hand-screw, 49 X X X, which is engaged with its screw-threads in a perforated and threaded projection on the slide and turns freely in the framing. This gives a very accurate and positive adjustment.

54 is a glass window or removable door, provided to enable the operations of the lfeeding apparatus to be Watched. 55 is a removable door (there may be several) to aiford access to the sieves and enable them to be removed as required.

The sieveS, if all of the kind represented at 5e and provided with brushes, may be arranged to all pass the material inthe same-direction, the siftings falling from each sieve in such case, falling onto a Worm or other suitable conveyer.-such, for instance, as represented in Figs. 1 and 2-and being thereby carried back to be discharged onto the head end of the next lower sieve, ,which in turn has a hopper -andcon veyer below it, and so on, the arrangement and operation being repeated as required.

What We claim is- 1. The toothed way 31, adapted to be ele vated or lowered, as set forth, in combination with a horizontally-revolving brush and Operating mechanism, as shown and specified.

2. The combination of-a brush, 18, with the pinion 34, carriage 32, toothed Way 3l, endless chain 29, pulleys uponv which the chain is worked, and suitable operating mechanism to produce an alternate motion, as set fort-h. v v

' FREDERICKy THOMPSON. v WILLIAMv HENRY WILLIAMSON. Witnesses: v

J. E. J oURI'rT, J osn. FARNDALE,

SOINS Clerks, Wakefield. 

